Press Release

TEN LEADING JAPANESE MANUFACTURES HAVE LICENSED UP.BROWSER FROM PHONE.COM

NEC, Casio, Kyocera, Sanyo, Sharp, Sony, DENSO, Toshiba, Hitachi and Matsushita (Panasonic) to Embed WAP Microbrowser in Wireless Products

REDWOOD CITY, Calif. (September 7, 1999) ¾ Phone.com, Inc. (Nasdaq:PHCM) today announced that NEC, Casio, Kyocera, Sanyo, Sharp, Sony, DENSO, Toshiba, Hitachi and Matsushita (Panasonic) have licensed the Phone.com� UP.Browser� microbrowser for development of their wireless phones. Under the agreements, each company's UP.Browser license will enable it to offer a state-of-the-art Wireless Application Protocol (WAP)-compatible microbrowser on their wireless phones.

"Phone.com is pleased to be partnering with leading Japanese manufactures such as NEC, Casio, Kyocera, Sanyo, Sharp, Sony, Denso, Toshiba, Hitachi and Matsushita (Panasonic) who have worldwide reputations for developing quality, cutting-edge, products," said Ben Linder, vice president of marketing for Phone.com. "It's very exciting to see leading handset manufactures implement our WAP V1.1 compliant software for additional features that can enhance the end-user experience while providing innovative capabilities that satisfy operator requirements."

These ten companies are among the 25+ licensees of the UP.Browser, which is currently being ported to over 40 distinct phone models for all major digital standards, including CDMA, GSM, PDC, PHS and TDMA.

Phone.com's UP.Browser software is a WAP compatible microbrowser that is designed and optimized for mass-market wireless telephones. Using UP.Browser, wireless subscribers can access Web-based information and services that are hosted on network operators' or third-party Web servers. Due to its open and highly portable architecture, UP.Browser can be embedded into different types of wireless telephones and utilize each mobile phone's specific display and input characteristics, such as graphical displays and programmable keys. UP.Browser, combined with each phone's existing user interface software, gives network operators a way to reach subscribers and add innovative services, with seamless integration of voice and data services.

Phone.com provides handset manufacturers with core and interface modules, which they adapt to existing phone models, greatly reducing their R&D investment. Handset manufacturers can optimize the integration of UP.Browser into their wireless handsets with the technical assistance, documentation and tools of Phone.com's OEM support organization.

About Phone.com
Phone.com, Inc. is a leading provider of software that enables the delivery of Internet-based services to mass-market wireless telephones. Using its software, wireless subscribers have access to Internet- and corporate intranet-based services, including Email, news, stocks, weather, travel and sports. In addition, subscribers have access via their wireless telephones to network operators' intranet-based telephony services, which may include over-the-air activation, call management, billing history information, pricing plan subscription and voice message management. Phone.com is headquartered in Silicon Valley, California and has regional offices in London and Tokyo. Visit http://www.phone.com for more information.

Except for the historical information contained herein, the matters discussed in this news release are forward-looking statements involving risks and uncertainties that could cause actual results to differ materially from those in such forward-looking statements. Potential risks and uncertainties include, but are not limited to, Phone.com's limited operating history, potential fluctuations in Phone.com's operating results, uncertainties related to the Phone.com's long sales cycle and reliance on a small number of customers, Phone.com's dependence on the acceptance of its products by network operators and wireless subscribers, Phone.com's ability to adequately address the rapidly-evolving market for delivery of Internet-based services through wireless telephones, the need to achieve widespread integration of Phone.com's browser in wireless telephones, competition from companies with substantially greater financial, technical, marketing and distribution resources and the ability of Phone.com to manage a complex set of engineering, marketing and distribution relationships. Further information regarding these and other risks is included in Phone.com's prospectus dated June 10, 1999 and in its other filings with the Securities and Exchange Commission.